Motor vehicle vacuum pump arrangement

Abstract

An electrical motor vehicle vacuum pump arrangement includes a housing assembly, a pump apparatus arranged therein, a drive motor, and a sound dampener. The housing assembly includes an inlet and an outlet opening arrangement. The pump apparatus includes a pump rotor housing with an inlet- and an outlet-side face wall, and a pump rotor housing part arranged therebetween. The inlet- and the outlet-side face wall and the pump rotor housing part enclose a pump rotor chamber with a pump rotor arranged therein. The drive motor is arranged in the housing assembly. The drive motor includes a motor rotor and a motor stator. The sound damper includes a first and a second sound damping chamber, and a sound dampener element. The first sound damping chamber is connected to the pump rotor chamber and to the second sound damping chamber. The second sound damping chamber is connected to the outlet opening arrangement.

What is claimed is: 
     
       1. An electrical motor vehicle vacuum pump arrangement comprising:
 a housing assembly comprising an inlet opening arrangement and an outlet opening arrangement; 
 a pump apparatus arranged in the housing assembly, the pump apparatus comprising a pump rotor housing which comprises an inlet-side face wall, an outlet-side face wall, and a pump rotor housing part arranged between the inlet-side face wall and the outlet-side face wall, the inlet-side face wall, the outlet-side face wall, and the pump rotor housing part being arranged to enclose a pump rotor chamber in which a pump rotor is arranged; 
 a drive motor arranged in the housing assembly, the drive motor comprising a motor rotor and a motor stator; and 
 a sound dampener configured to provide a noise reduction, the sound damper comprising,
 a first sound damping chamber and a second sound damping chamber connected in series,
 wherein, 
 the first sound damping chamber is fluidically connected to the pump rotor chamber via a first connecting arrangement, 
 the first sound damping chamber is fluidically connected to the second sound damping chamber via a second connecting arrangement, and 
 the second sound damping chamber is fluidically connected to the outlet opening arrangement, and 
 
 a sound dampener element provided as a bore arrangement for the outlet opening arrangement, the bore arrangement comprising bore elements which are respectively arranged in the outlet-side face wall, in the pump rotor housing part, and in the inlet-side face wall, wherein the bore element arranged in the inlet-side face wall is flared towards an outlet side, and wherein the outlet opening arrangement of the bore arrangement opens to an exterior of the electrical motor vehicle vacuum pump arrangement. 
 
 
     
     
       2. The electrical motor vehicle vacuum pump arrangement as recited in  claim 1 , wherein the first sound damping chamber is integrated in the outlet-side face wall. 
     
     
       3. The electrical motor vehicle vacuum pump arrangement as recited in  claim 2 , wherein the first connecting arrangement comprises,
 a first pump outlet which comprises a check valve, and 
 a second pump outlet which is offset with regard to the first pump outlet when viewed from above or below the pump rotor along an axis of rotation of the pump rotor. 
 
     
     
       4. The electrical motor vehicle vacuum pump arrangement as recited in  claim 1 , wherein,
 the first sound damping chamber is created by a cover element arranged on a side of the outlet-side face wall facing away from the pump rotor, and 
 the second connecting arrangement is configured as a groove in the outlet-side face wall. 
 
     
     
       5. The electrical motor vehicle vacuum pump arrangement as recited in  claim 1 , wherein the housing assembly further comprises an end cover element which is configured to encompass the outlet-side face wall so as to define the second sound damping chamber. 
     
     
       6. The electrical motor vehicle vacuum pump arrangement as recited in  claim 1 , further comprising:
 a bearing, 
 wherein, 
 the pump apparatus is arranged coaxially to the drive motor, and 
 the motor rotor comprises a rotor shaft which is supported in the inlet-side face wall via the bearing. 
 
     
     
       7. The electrical motor vehicle vacuum pump arrangement as recited in  claim 1 , wherein the inlet opening arrangement is arranged in the inlet-side face wall. 
     
     
       8. The electrical motor vehicle vacuum pump arrangement as recited in  claim 1 , wherein the pump apparatus is a vane pump apparatus. 
     
     
       9. An electrical motor vehicle vacuum pump arrangement comprising:
 a housing assembly comprising an inlet opening arrangement and an outlet opening arrangement; 
 a pump apparatus arranged in the housing assembly, the pump apparatus comprising a pump rotor housing which comprises an inlet-side face wall, an outlet-side face wall, and a pump rotor housing part arranged between the inlet-side face wall and the outlet-side face wall, the inlet-side face wall, the outlet-side face wall, and the pump rotor housing part being arranged to enclose a pump rotor chamber in which a pump rotor is arranged; 
 a drive motor arranged in the housing assembly, the drive motor comprising a motor rotor and a motor stator; and 
 a sound dampener configured to provide a noise reduction, the sound damper comprising,
 a first sound damping chamber and a second sound damping chamber connected in series,
 wherein, 
 the first sound damping chamber is fluidically connected to the pump rotor chamber via a first connecting arrangement, 
 the first sound damping chamber is fluidically connected to the second sound damping chamber via a second connecting arrangement, and 
 the second sound damping chamber is fluidically connected to the outlet opening arrangement, and 
 
 
 a sound dampener element provided as a bore arrangement for the outlet opening arrangement, the bore arrangement comprising bore elements which are respectively arranged in the outlet-side face wall, in the pump rotor housing part, and in the inlet-side face wall, wherein the bore elements are configured to continuously flare towards an outlet side through each of the outlet-side face wall, the pump rotor housing part, and the inlet-side face wall, and wherein the outlet opening arrangement of the bore arrangement opens to an exterior of the electrical motor vehicle vacuum pump arrangement. 
 
     
     
       10. The electrical motor vehicle vacuum pump arrangement as recited in  claim 9 , wherein the first sound damping chamber is integrated in the outlet-side face wall. 
     
     
       11. The electrical motor vehicle vacuum pump arrangement as recited in  claim 10 , wherein the first connecting arrangement comprises,
 a first pump outlet which comprises a check valve, and 
 a second pump outlet which is offset with regard to the first pump outlet when viewed when viewed from above or below the pump rotor along an axis of rotation of the pump rotor. 
 
     
     
       12. The electrical motor vehicle vacuum pump arrangement as recited in  claim 9 , wherein,
 the first sound damping chamber is created by a cover element arranged on a side of the outlet-side face wall facing away from the pump rotor, and 
 the second connecting arrangement is configured as a groove in the outlet-side face wall. 
 
     
     
       13. The electrical motor vehicle vacuum pump arrangement as recited in  claim 9 , wherein the housing assembly further comprises an end cover element which is configured to encompass the outlet-side face wall so as to define the second sound damping chamber. 
     
     
       14. An electrical motor vehicle vacuum pump arrangement comprising:
 a housing assembly comprising an inlet opening arrangement, an outlet opening arrangement, and an end cover element; 
 a pump apparatus arranged in the housing assembly, the pump apparatus comprising a pump rotor housing which comprises an inlet-side face wall, an outlet-side face wall, and a pump rotor housing part arranged between the inlet-side face wall and the outlet-side face wall, the inlet-side face wall, the outlet-side face wall, and the pump rotor housing part being arranged to enclose a pump rotor chamber in which a pump rotor is arranged; 
 a drive motor arranged in the housing assembly, the drive motor comprising a motor rotor and a motor stator; and 
 a sound dampener configured to provide a noise reduction, the sound damper comprising,
 a first sound damping chamber and a second sound damping chamber connected in series,
 wherein, 
 the first sound damping chamber is fluidically connected to the pump rotor chamber via a first connecting arrangement, 
 the first sound damping chamber is fluidically connected to the second sound damping chamber via a second connecting arrangement, and 
 the second sound damping chamber is fluidically connected to the outlet opening arrangement, and 
 
 a sound dampener element provided as a bore arrangement for the outlet opening arrangement, the bore arrangement comprising bore elements which are respectively arranged in the outlet-side face wall, in the pump rotor housing part, and in the inlet-side face wall, wherein the bore elements are configured to continuously flare towards an outlet side through each of the outlet-side face wall, the pump rotor housing part, and the inlet-side face wall, and wherein the outlet opening arrangement of the bore arrangement opens to an exterior of the electrical motor vehicle vacuum pump arrangement, 
 
 wherein, 
 the end cover element of the housing assembly is configured to encompass the outlet-side face wall, the pump rotor housing part, and at least a part of the inlet-side face wall, and 
 the second sound damping chamber is defined by the end cover element encompassing the outlet-side face wall. 
 
     
     
       15. The electrical motor vehicle vacuum pump arrangement as recited in  claim 14 , wherein the first sound damping chamber is integrated in the outlet-side face wall. 
     
     
       16. The electrical motor vehicle vacuum pump arrangement as recited in  claim 15 , wherein the first connecting arrangement comprises,
 a first pump outlet which comprises a check valve, and 
 a second pump outlet which is offset with regard to the first pump outlet when viewed when viewed from above or below the pump rotor along an axis of rotation of the pump rotor. 
 
     
     
       17. The electrical motor vehicle vacuum pump arrangement as recited in  claim 14 , wherein,
 the first sound damping chamber is created by a cover element arranged on a side of the outlet-side face wall facing away from the pump rotor, and 
 the second connecting arrangement is configured as a groove in the outlet-side face wall.